In many cultures, there is a common stereotype that elderly individuals may have reduced mobility or be less active due to age-related health issues. However, this is not universally true, and many elderly people remain active and mobile well into old age.

This phrase seems to describe a situation where an elderly man (the grandfather) is physically active or moving around, possibly in a way that is surprising or noteworthy, and a young maid is present or involved.

Without more context, it's difficult to provide a more specific explanation. However, I can offer some general insights.

The translation of the phrase is: "old grandfather moves young maid".